A Game of Mutually Assured Destruction

In the not so distant future, mankind has learned they are not alone in the universe. They have a tenuous peace with aliens on Earth, but it may be time to activate their ultimate weapon.

Each player acts as a representative of a country in an isolated bunker where they control a button to activate a weapon to blow up the planet. Their only contact is with other bunkers and radio messages from the outside world. Have some of the other bunkers been compromised by aliens? Have extremists taken over the weapon? What is that noise outside? Surely it is just in your head…